In regard to this particular swing I wonder whether it is an insight into his machine adjustments for an extreme "special purposes" type situation. Hogan going John Daly for the camera. I think this swing from his late forties shot making demonstration at Augusta, not a tournament or a practice session even. He seems to be hanging back to me more than normal, if you watch the entire swing he backs out of the shot actually. My guess is that he was, in our terms, moving his left shoulder back vis a vis the ball to add some height to the trajectory in addition to really swinging hard it. A Remax Long Drive type swing deal. Nothing is new I guess. He is sacrificing balance (very, very rare for him) for launch angle and distance. I only mention this because while its a very interesting swing from a power move perspective and machine adjustment perspective, it isnt I dont think representative of his swing pre accident, Power Golf , or his tournament swing from that era or anything. Not exactly.
Could be . . . however I have seen Hogan make some "fall back" looking swings. I think there were times that he tried to beat on it with the driver. I mean if you look at the footage in the Shell match . . . the driver swings look considerably more long and slashy . . . even in power golf you can see the difference in the iron swings vs. driver swings in the amount of arm swing he has.
that being said . . . you can ALWAYS see that use the ground principle with Hogan.